Borussia Dortmund's Jeremy Toljan is the latest right-back to be linked with a move to Celtic.
According to the Daily Mail, Celtic are exploring a deal for the defender.
Celtic are looking for a long-term replacement for right-back Mikael Lustig. With his contract at Parkhead expiring, the Swede is expected to sign for AIK Stockholm.
Already this winter Celtic have been linked with moves for Porto's Fernando Fonseca, Atalanta's Timothy Castagne, Olympiacos' Omar Elabdellaoui and Lech Poznan's Robert Gumny.
The 24-year-old Toljan, who has played at U21 level for Germany, joined Dortmund from Hoffenheim in August 2017.
He made 23 appearances for the club in his first season but his first-team chances have since diminished.
It's said that Toljan has been told he can leave the club on loan before this month's transfer window closes.
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